Use this reference when checking 16 inch Schedule 10 pipe dimensions for piping layouts, material takeoffs, fabrication drawings, and preliminary weight estimates. The page identifies the relationship between NPS 16, DN400, outside diameter, wall thickness, inside diameter, and mass per unit length.
For related project work, compare this data with the site’s pipe schedule reference, pipe fittings dimensions, flange dimensions, and pipe weight calculator resources. Those references can help connect straight-pipe dimensions with the components and calculations used in a complete piping system.
Schedule 10 pipe 16 inch (DN400) is a large-diameter steel pipe size commonly used as a reference in piping design, fabrication, drafting, and estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 16 Schedule 10 pipe based on ASME B36.10.
16 Inch Schedule 10 Pipe Dimensions
- Nominal Pipe Size (NPS): 16 inch
- Diameter Nominal (DN): DN400
- Outside Diameter (OD): 406.4 mm
- Wall Thickness: 6.35 mm
- Inside Diameter (ID): 393.7 mm
- Pipe Weight: 62.65 kg/m
- Pipe Weight Filled With Water: 184.32 kg/m
- Reference Standard: ASME B36.10
Schedule 10 Pipe 16 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 16 inch | 400 | 406.4 | 6.35 | 393.7 | 62.65 |
What Does Schedule 10 Mean?
Schedule 10 refers to the wall thickness series of the pipe. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness changes depending on the schedule. A thicker wall generally increases pipe weight and reduces the inside diameter.
Typical Uses of 16 Inch Schedule 10 Pipe
NPS 16 Schedule 10 pipe is commonly used where large flow capacity is needed with relatively lighter wall thickness than heavier schedules. It may be used in water transfer lines, utility systems, low-pressure process piping, drainage applications, and general plant layout or fabrication reference work.
Why Pipe Weight Matters
Pipe weight per meter is important for transport planning, support design, structural loading, fabrication estimates, and lifting calculations. In large-diameter piping systems, total line weight can significantly affect support spacing, installation methods, and project cost.
16 Inch Schedule 10 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimension data using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material grade, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 16 inch Schedule 10 pipe?
The outside diameter is 406.4 mm.
What is the wall thickness of DN400 Schedule 10 pipe?
The wall thickness is 6.35 mm.
What is the inside diameter of NPS 16 Schedule 10 pipe?
The inside diameter is 393.7 mm.
How much does 16 inch Schedule 10 pipe weigh?
The approximate weight is 62.65 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for welded and seamless wrought steel pipe.
Conclusion
Schedule 10 pipe 16 inch (DN400) has an outside diameter of 406.4 mm, wall thickness of 6.35 mm, inside diameter of 393.7 mm, and a weight of 62.65 kg/m. It is a useful reference for piping design, drafting, estimating, and fabrication work.
How to Read the 16 Inch Schedule 10 Pipe Data
NPS 16 and DN400 are nominal size designations, not direct measurements of the pipe bore. For drafting and checking purposes, use the listed outside diameter, wall thickness, and inside diameter rather than assuming that the nominal size equals a measured dimension.
The outside diameter is the reference dimension commonly used when coordinating pipe with supports, clamps, sleeves, fittings, and layout clearances. Wall thickness is used to distinguish the Schedule 10 section from other schedule designations for the same nominal pipe size. The listed inside diameter is useful when reviewing flow-path geometry, internal clearances, and connection details.
Using Pipe Weight in Estimates and Drawings
The mass-per-meter value is a straight-pipe reference. Multiply it by the applicable pipe length when preparing a preliminary material estimate, transport plan, or support-load review. For a complete installed line, account separately for fittings, flanges, valves, insulation, supports, and any contents or attachments that are part of the project scope.
The water-filled value should be treated as a reference for the pipe together with its stated water contents. Actual installed loads depend on the line configuration and what equipment or materials are included in the calculation. Engineering review is required before using a tabulated weight for final support, lifting, structural, or operating-load decisions.
Drafting and Procurement Checks
- Confirm that the drawing uses the intended NPS and DN designations.
- Use the tabulated outside diameter when checking clearances and interfaces.
- Check wall thickness and material requirements separately from the schedule designation.
- Verify that fittings, flanges, gaskets, and valves are compatible with the selected pipe dimensions and joining method.
- For CAD work, pair the dimension reference with the site’s pipe DWG resources and review the drawing units before placing the file.
Schedule designation describes a wall-thickness series; it does not by itself establish material grade, corrosion allowance, allowable pressure, temperature limits, or a design approval. Those items must be confirmed against the project specification and applicable engineering requirements.
Additional Questions About 16 Inch Schedule 10 Pipe
Is 16 inch pipe the same as DN400 pipe?
In this reference, NPS 16 is paired with the nominal metric designation DN400. The designations identify the same nominal pipe size, while the actual outside and inside dimensions are given separately in the data.
Does Schedule 10 describe the pipe material?
No. Schedule 10 identifies the wall-thickness series for the nominal size. Material grade, manufacturing requirements, and service suitability must be checked independently.
Can the listed weight be used as the final installed line load?
No. It is a pipe reference value. Final line-load calculations may also need fittings, flanges, valves, insulation, supports, contents, and other attached items.
Why should the inside diameter be checked instead of inferred from the nominal size?
Nominal size is a designation rather than a guaranteed measured bore. The listed inside diameter provides the dimension to use for layout review and other calculations that depend on the internal opening.